APA

Norris C. M., . (2000). Back stability. Champaign: Human Kinetics.

Chicago

Norris Christopher M, . 2000. Back stability. Champaign: Human Kinetics.

Harvard

Norris C. M., . (2000). Back stability. Champaign: Human Kinetics.

MLA

Norris Christopher M, . Back stability. Champaign: Human Kinetics. 2000.